Google DeepMind Demos Gemini 3.1 Pro Building a Realistic City Planner With Traffic Simulation

DeepMind showed Gemini 3.1 Pro generating a full city planning application that handles terrain modeling, infrastructure layout, and traffic simulation — a signal that frontier models are moving from toy demos to domain-specific professional tools.

Google DeepMind released a demo Thursday of Gemini 3.1 Pro generating a realistic city planner application that handles terrain rendering, infrastructure placement, and live traffic simulation. As @GoogleDeepMind showed, the model doesn't just produce a visual mockup — it builds a functional simulation environment with interacting systems.

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